Is this something I should worry a lot about. Its a small red bump on the top section in the middle of that part. I noticed its mostly on the chicks with pasty butts. I've cleaned most of the ones with pasty butts before letting them under the heat lamp again but I hadta quit when I noticed most of them were going to nap I left them be because they were freaked out by people moving their brooder and lawnmower starting up. Is there anything else I should do?